diff --git a/src/libsodium/sodium/core.c b/src/libsodium/sodium/core.c
index 1ac29d09..d667312f 100644
--- a/src/libsodium/sodium/core.c
+++ b/src/libsodium/sodium/core.c
@@ -21,7 +21,7 @@
 #include "private/implementations.h"
 #include "private/mutex.h"
 
-#if !defined(_MSC_VER) && 0
+#if !defined(_MSC_VER) && 1
 # warning *** This is unstable, untested, development code.
 # warning It might not compile. It might not work as expected.
 # warning It might be totally insecure.